Re: /var/log/messages doesn't have crash info when kernel gets panic/oops/crash

Eric W. Biederman
2009-06-13T07:11:45Z

Dharmosoth Seetharam <dseetharam@inbox.com> writes:

> Hi Neil,
>
> Thanks for your quick reply.
>
> What you have suggested is nice when we got/save crash dump (i.e vmcore)
> What if we failed to save/capture vmcore info or vmcore is corrupted etc. then we dont get any information
> regarding the panic/crash/oops at anywhere?

Basic questions.
1) Do you have panic on oops set?
I think that setting more than anything else will be the
difference in what shows up in /var/log/messages.
2) Have you tried a dry run and confirmed you can get a crash dump?
3) Are you using kvm

Eric

> Thanks and Regards
>
> Seetharam
>
>
>> -----Original Message-----
>> From: nhorman@redhat.com
>> Sent: Fri, 12 Jun 2009 16:05:13 -0400
>> To: dseetharam@inbox.com
>> Subject: Re: /var/log/messages doesn't have crash info when kernel gets
>> panic/oops/crash
>>
>> On Fri, Jun 12, 2009 at 01:25:49AM -0800, Dharmosoth Seetharam wrote:
>>> Hi,
>>>
>>> I have encounter a problem called /var/log/messages does not contain any
>>> information
>>> on kernel crash dump.
>>>
>>> Prior to enabling KEXEC we saw stack traces and bug info etc in
>>> /var/log/messages.
>>> After enabling KEXEC feature those info was missed.
>>>
>>> How can we get those missed info in /var/log/messages even when KEXEC
>>> feature is enabled.
>>>
>>> Any help will appreciate.
>>>
>> run crash on the resultant vmcore file that kexec can produce/save and
>> get the
>> dmesg log out of it.
>> alternatively you can use makedumpfile with the --dump-dmesg log
>>
>> Neil
>>
>>>
>>> Thanks and Regards
>>> Seetharam
>>>
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